The nation is now processing a second mass shooting involving Asian Americans in California in the midst of the Lunar New Year. Connie Chung Joe, CEO of Asian Americans Advancing Justice Southern California, talks about the community impact. Then, Elizabeth Day, a senior teaching fellow in geophysics at Imperial College London, talks about new research that shows the Earth's core is spinning at a rate slightly slower than the rest of the planet. And, the Oscar nominations were announced Tuesday morning. "Everything, Everywhere, All at Once" led the way with 11 nominations, including Best Picture. KPCC's John Horn runs down some of the top nominees.